Other leaves turn light green and stay smaller than normal.
30+ Pepper Plant Leaves Turning Purple. Last year i left the ripe red bell pepper on the plant for a while. The stems, especially around branch and leaf nodes, often seem to produce it, particularly in seedlings.
Pepper Plants Dropping Leaves Stunted And Purple Plants Forum At Permies from permies.com
Seems to be thriving in a container. When pepper plants have gorgeous leaves and no flowers, there's probably too much nitrogen in the soil. I have banana peppers and jalapenio's in my garden for the first time ever.
But unfortunately yesterday i have noticed few white flies under the leaves.
What to watch out for. If its cold then they take energyt away form what you want to try and fix the issues of purpling but they cant so. I placed a thick layer of compost down on top of the soil once they were planted. The leaves and flowers are turning brown and purple.